Re-S-1800 Routing Engine Components - Juniper MX240 Hardware Manual

Figure 26: RE-S-1800 Front View
Auxiliary Ethernet
port port
Extractor
clip
Console USB
port port

RE-S-1800 Routing Engine Components

Each Routing Engine consists of the following components:
CPU—Runs Junos OS to maintain the router's routing tables and routing protocols..
DRAM—Provides storage for the routing and forwarding tables and for other Routing Engine processes.
USB port—Provides a removable media interface through which you can install Junos OS manually. Junos
OS supports USB version 1.0.
CompactFlash card—Provides primary storage for software images, configuration files, and microcode.
The CompactFlash card is fixed and is inaccessible from outside the router.
Solid-state Drive (SSD)—Provides secondary storage for log files, memory dumps, and rebooting the
system if the CompactFlash card fails.
Interface ports—The AUX, CONSOLE, and ETHERNET provide access to management devices. Each
Routing Engine has one 10/100/1000-Mbps Ethernet port for connecting to a management network,
and two asynchronous serial ports—one for connecting to a console and one for connecting to a modem
or other auxiliary device.
EEPROM—Stores the serial number of the Routing Engine.
RESET button—Reboots the Routing Engine when pressed.
ONLINE/OFFLINE button—Takes the Routing Engine online or offline when pressed.
Extractor clips—Used for inserting and extracting the Routing Engine.
Captive screws—Secure the Routing Engine in place.
NOTE: For specific information about Routing Engine components (for example, the amount of
DRAM), issue the show chassis routing-engine command.
SSD SSD
slot 1 slot 2
Reset
button
Extractor
clip
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